<template>
  <footer class="footer">
    <!-- 统计 -->
    <span class="todo-count"
      >合 计:<strong> {{ len }}</strong></span
    >
    <!-- 清空 -->
    <button class="clear-completed" @click="clear">清空任务</button>
  </footer>
</template>

<script>
export default {
  props: ["len"],
  methods: {
    clear() {
        this.$emit('clearAll',[]);
    },
  },
};
</script>

<style>
</style>